#字典
student = {1:"张三",2:"李四",3:"王五","P123":"小明"}
print(student)
'''
print("\n删除王五\n")
del student[3]
print(student)
print(student[2])
'''
for key in student.keys():
    print(key)
for value in student.values():
    print(value)
for item in student.items():
    print(item)
